The pair of pop stars have been bickering since 2012 in a high-profile feud that reportedly started over backup dancers.

In the latest video, which was directed by Swift and Drew Kirsch, the singer and her pals live in a colorful trailer park where they party around an above-ground swimming pool, serving up snow cones and dancing in the dirt street.

From Katy Perry to Cardi B, the Grammys Most Outlandish Looks, Ranked (Photos)

The 61st Annual Grammy Awards brought out musicians from across the globe to honor their own Sunday night. It also brought out a few who maybe should have thought about giving themselves one last look in the mirror before stepping outside and heading to the Los Angeles' STAPLES Center. Here's a look at this year's Grammys fashion, ranked from least to most outlandish.

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Katy Perry

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Cardi B

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Bebe Rexha

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Tierra Whack

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Tayla Parx

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Ricky Rebel wore a patriotic jacket with "Keep America Great" on the front and "Donald Trump" across the back.

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Joy Villa isn't shy about her political leanings, as displayed in this brick-patterned gown with "Build the Wall" across her behind.

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Leon Bridges

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Heidi Klum

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Andra Day

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George Clinton, here with Stephanie Lynn Clinton

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Shawn Everett

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Du Yun

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Andrea Echeverry from the Colombian rock band Aterciopelados

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Gold lame cones to mini puff balls and futuristic masks… just another day for Hollywood awards show fashion

The 61st Annual Grammy Awards brought out musicians from across the globe to honor their own Sunday night. It also brought out a few who maybe should have thought about giving themselves one last look in the mirror before stepping outside and heading to the Los Angeles' STAPLES Center. Here's a look at this year's Grammys fashion, ranked from least to most outlandish.